FILE MANAGER
SECTION 3.5
3.5.2
3.5.3
VER.V09F
FILE CONTROL BWCK
The FCB contains 36 bytes of information on the current file
being accessed. On HUNTER, the default FCB location is at
005CH, containing the following information:-
TABLE
3.3 FCB DESCRIPTION.
Byte
1
2-9
10-12
13
14-15
16
17-32
33
34-36
Description
Drive code (zero)
Eight Character ASCII filename
ASCII file extension
Current extent number
Reserved
Record count for extent
Reserved for system use
Current record in sequential file operation
Random record number
HUNTER SYSTEM CAUS
This manual does not contain an exhaustive description of each
system call, since they are defined and explained
in great depth
in many other publications. However, there does follow a brief
description of each call, together with details of extra calls
specific to HUNTER.
The C register is loaded with the call number plus any other
parameters into other registers, and the A call is made to
address 0005. Registers not mentioned are irrelevant on entry,
and none are necessarily preserved on exit. For making these
calls from Basic, see the CALL and ARG in Part 5, BASIC
FUNCTIONS and section 4.8, MACHINE CODE CALLS.
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